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<title>The source code</title>
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<pre class="prettyprint lang-js">/*!
* Ext JS Library 3.4.0
* Copyright(c) 2006-2011 Sencha Inc.
* licensing@sencha.com
* http://www.sencha.com/license
*/
<div id="cls-Ext.layout.ContainerLayout"></div>/**
* @class Ext.layout.ContainerLayout
* <p>This class is intended to be extended or created via the <tt><b>{@link Ext.Container#layout layout}</b></tt>
* configuration property. See <tt><b>{@link Ext.Container#layout}</b></tt> for additional details.</p>
*/
Ext.layout.ContainerLayout = Ext.extend(Object, {
<div id="cfg-Ext.layout.ContainerLayout-extraCls"></div>/**
* @cfg {String} extraCls
* <p>An optional extra CSS class that will be added to the container. This can be useful for adding
* customized styles to the container or any of its children using standard CSS rules. See
* {@link Ext.Component}.{@link Ext.Component#ctCls ctCls} also.</p>
* <p><b>Note</b>: <tt>extraCls</tt> defaults to <tt>''</tt> except for the following classes
* which assign a value by default:
* <div class="mdetail-params"><ul>
* <li>{@link Ext.layout.AbsoluteLayout Absolute Layout} : <tt>'x-abs-layout-item'</tt></li>
* <li>{@link Ext.layout.Box Box Layout} : <tt>'x-box-item'</tt></li>
* <li>{@link Ext.layout.ColumnLayout Column Layout} : <tt>'x-column'</tt></li>
* </ul></div>
* To configure the above Classes with an extra CSS class append to the default. For example,
* for ColumnLayout:<pre><code>
* extraCls: 'x-column custom-class'
* </code></pre>
* </p>
*/
<div id="cfg-Ext.layout.ContainerLayout-renderHidden"></div>/**
* @cfg {Boolean} renderHidden
* True to hide each contained item on render (defaults to false).
*/
<div id="prop-Ext.layout.ContainerLayout-activeItem"></div>/**
* A reference to the {@link Ext.Component} that is active. For example, <pre><code>
* if(myPanel.layout.activeItem.id == 'item-1') { ... }
* </code></pre>
* <tt>activeItem</tt> only applies to layout styles that can display items one at a time
* (like {@link Ext.layout.AccordionLayout}, {@link Ext.layout.CardLayout}
* and {@link Ext.layout.FitLayout}). Read-only. Related to {@link Ext.Container#activeItem}.
* @type {Ext.Component}
* @property activeItem
*/
// private
monitorResize:false,
// private
activeItem : null,
constructor : function(config){
this.id = Ext.id(null, 'ext-layout-');
Ext.apply(this, config);
},
type: 'container',
/* Workaround for how IE measures autoWidth elements. It prefers bottom-up measurements
whereas other browser prefer top-down. We will hide all target child elements before we measure and
put them back to get an accurate measurement.
*/
IEMeasureHack : function(target, viewFlag) {
var tChildren = target.dom.childNodes, tLen = tChildren.length, c, d = [], e, i, ret;
for (i = 0 ; i < tLen ; i++) {
c = tChildren[i];
e = Ext.get(c);
if (e) {
d[i] = e.getStyle('display');
e.setStyle({display: 'none'});
}
}
ret = target ? target.getViewSize(viewFlag) : {};
for (i = 0 ; i < tLen ; i++) {
c = tChildren[i];
e = Ext.get(c);
if (e) {
e.setStyle({display: d[i]});
}
}
return ret;
},
// Placeholder for the derived layouts
getLayoutTargetSize : Ext.EmptyFn,
// private
layout : function(){
var ct = this.container, target = ct.getLayoutTarget();
if(!(this.hasLayout || Ext.isEmpty(this.targetCls))){
target.addClass(this.targetCls);
}
this.onLayout(ct, target);
ct.fireEvent('afterlayout', ct, this);
},
// private
onLayout : function(ct, target){
this.renderAll(ct, target);
},
// private
isValidParent : function(c, target){
return target && c.getPositionEl().dom.parentNode == (target.dom || target);
},
// private
renderAll : function(ct, target){
var items = ct.items.items, i, c, len = items.length;
for(i = 0; i < len; i++) {
c = items[i];
if(c && (!c.rendered || !this.isValidParent(c, target))){
this.renderItem(c, i, target);
}
}
},
/**
* @private
* Renders the given Component into the target Element. If the Component is already rendered,
* it is moved to the provided target instead.
* @param {Ext.Component} c The Component to render
* @param {Number} position The position within the target to render the item to
* @param {Ext.Element} target The target Element
*/
renderItem : function(c, position, target){
if (c) {
if (!c.rendered) {
c.render(target, position);
this.configureItem(c);
} else if (!this.isValidParent(c, target)) {
if (Ext.isNumber(position)) {
position = target.dom.childNodes[position];
}
target.dom.insertBefore(c.getPositionEl().dom, position || null);
c.container = target;
this.configureItem(c);
}
}
},
// private.
// Get all rendered items to lay out.
getRenderedItems: function(ct){
var t = ct.getLayoutTarget(), cti = ct.items.items, len = cti.length, i, c, items = [];
for (i = 0; i < len; i++) {
if((c = cti[i]).rendered && this.isValidParent(c, t) && c.shouldLayout !== false){
items.push(c);
}
};
return items;
},
/**
* @private
* Applies extraCls and hides the item if renderHidden is true
*/
configureItem: function(c){
if (this.extraCls) {
var t = c.getPositionEl ? c.getPositionEl() : c;
t.addClass(this.extraCls);
}
// If we are forcing a layout, do so *before* we hide so elements have height/width
if (c.doLayout && this.forceLayout) {
c.doLayout();
}
if (this.renderHidden && c != this.activeItem) {
c.hide();
}
},
onRemove: function(c){
if(this.activeItem == c){
delete this.activeItem;
}
if(c.rendered && this.extraCls){
var t = c.getPositionEl ? c.getPositionEl() : c;
t.removeClass(this.extraCls);
}
},
afterRemove: function(c){
if(c.removeRestore){
c.removeMode = 'container';
delete c.removeRestore;
}
},
// private
onResize: function(){
var ct = this.container,
b;
if(ct.collapsed){
return;
}
if(b = ct.bufferResize && ct.shouldBufferLayout()){
if(!this.resizeTask){
this.resizeTask = new Ext.util.DelayedTask(this.runLayout, this);
this.resizeBuffer = Ext.isNumber(b) ? b : 50;
}
ct.layoutPending = true;
this.resizeTask.delay(this.resizeBuffer);
}else{
this.runLayout();
}
},
runLayout: function(){
var ct = this.container;
this.layout();
ct.onLayout();
delete ct.layoutPending;
},
// private
setContainer : function(ct){
<div id="prop-Ext.layout.ContainerLayout-if"></div>/**
* This monitorResize flag will be renamed soon as to avoid confusion
* with the Container version which hooks onWindowResize to doLayout
*
* monitorResize flag in this context attaches the resize event between
* a container and it's layout
*/
if(this.monitorResize && ct != this.container){
var old = this.container;
if(old){
old.un(old.resizeEvent, this.onResize, this);
}
if(ct){
ct.on(ct.resizeEvent, this.onResize, this);
}
}
this.container = ct;
},
<div id="method-Ext.layout.ContainerLayout-parseMargins"></div>/**
* Parses a number or string representing margin sizes into an object. Supports CSS-style margin declarations
* (e.g. 10, "10", "10 10", "10 10 10" and "10 10 10 10" are all valid options and would return the same result)
* @param {Number|String} v The encoded margins
* @return {Object} An object with margin sizes for top, right, bottom and left
*/
parseMargins : function(v){
if (Ext.isNumber(v)) {
v = v.toString();
}
var ms = v.split(' '),
len = ms.length;
if (len == 1) {
ms[1] = ms[2] = ms[3] = ms[0];
} else if(len == 2) {
ms[2] = ms[0];
ms[3] = ms[1];
} else if(len == 3) {
ms[3] = ms[1];
}
return {
top :parseInt(ms[0], 10) || 0,
right :parseInt(ms[1], 10) || 0,
bottom:parseInt(ms[2], 10) || 0,
left :parseInt(ms[3], 10) || 0
};
},
<div id="prop-Ext.layout.ContainerLayout-fieldTpl"></div>/**
* The {@link Ext.Template Ext.Template} used by Field rendering layout classes (such as
* {@link Ext.layout.FormLayout}) to create the DOM structure of a fully wrapped,
* labeled and styled form Field. A default Template is supplied, but this may be
* overriden to create custom field structures. The template processes values returned from
* {@link Ext.layout.FormLayout#getTemplateArgs}.
* @property fieldTpl
* @type Ext.Template
*/
fieldTpl: (function() {
var t = new Ext.Template(
'<div class="x-form-item {itemCls}" tabIndex="-1">',
'<label for="{id}" style="{labelStyle}" class="x-form-item-label">{label}{labelSeparator}</label>',
'<div class="x-form-element" id="x-form-el-{id}" style="{elementStyle}">',
'</div><div class="{clearCls}"></div>',
'</div>'
);
t.disableFormats = true;
return t.compile();
})(),
/*
* Destroys this layout. This is a template method that is empty by default, but should be implemented
* by subclasses that require explicit destruction to purge event handlers or remove DOM nodes.
* @protected
*/
destroy : function(){
// Stop any buffered layout tasks
if(this.resizeTask && this.resizeTask.cancel){
this.resizeTask.cancel();
}
if(this.container) {
this.container.un(this.container.resizeEvent, this.onResize, this);
}
if(!Ext.isEmpty(this.targetCls)){
var target = this.container.getLayoutTarget();
if(target){
target.removeClass(this.targetCls);
}
}
}
});</pre>
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